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1·Proof of this can be determined by dropping a baby tooth into a glass of it, then going back the next morning to find most of it eaten away.

我们来终结这个流言：将一颗牙齿仍在可乐玻璃杯里，第二天早上回来发现大部分被蚕食了。

2·My dentist always goes the extra mile, offering free back massages at the end of a stressful tooth extraction.

我的牙医总是非常尽心尽力，会在紧张的拔牙手术后给病人按摩。

3·This system can optimize the parameter of gears, check relief grinding of tooth back automatically and design the gear hobs rapidly and reliably.

该系统可优化滚刀设计参数，自动校核齿背铲磨，实现齿轮刀具快速可靠的设计。

4·Not only do they have a sharpened peg of a tooth but their teeth narrow down to a razor sharp edge at the back making the tigers bite much more lethal.

它们不仅仅有锋利的三角状牙齿，而且背面向下逐渐收缩成剃刀一样锋利，这使得老虎的咬更加致命。

5·The best profile for tooth back of the relieving shaped milling cutter is firstly presented in theory.

用成形铣刀铣螺旋槽时，求成形铣刀廓形的问题是个求解空间啮合运动的理论问题。

6·The back iron is removably attached to the second end of the tooth body and adjacent stator segments are spaced by interfaced adjacent back iron.

护铁可拆卸地附连到所述齿主体的第二端并且相邻定子节段由 对接相邻护铁间隔。

7·I took the dog around the block to get out of the house, and I came back to see her leaving her room... my electric tooth brush in her hand.

我带着狗出去遛了遛。我回来的时候正巧碰见她出来，手里拿的东西是——我的电动牙刷。